The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2020
Filed:
Feb. 22, 2016
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Go Hayashita, Chigasaki, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
A control device for an internal combustion engine performs feedback control so that the air-fuel ratio of the exhaust gas flowing into an exhaust purification catalyst becomes a target air-fuel ratio and switches the target air-fuel ratio to lean when an output air-fuel ratio of a downstream side air-fuel ratio sensor is judged rich and switches the target air-fuel ratio to rich when an output air-fuel ratio of the downstream side air-fuel ratio sensor is judged lean. The control device judges that the downstream side air-fuel ratio sensor has not become abnormal when the value of the excess/deficiency parameter from when switching the target air-fuel ratio to lean or rich to when the output air-fuel ratio of the downstream side air-fuel ratio sensor is judged rich or lean is larger than a predetermined limit value.